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#include <stdlib.h>
#include <string.h>
#include "types.h"
#include "world.h"
#include "log.h"
struct world {
struct entity entities[WORLD_MAX_ENTITIES];
};
struct world *
dp_world_create()
{
struct world *w;
if (!(w = malloc(sizeof(*w))))
return NULL;
memset(w, 0, sizeof(*w));
return w;
}
void
dp_free_world(struct world *w)
{
if (w)
free(w);
}
int
dp_world_create_entity(struct world *w, int kind)
{
int i;
struct entity *e;
if (!w)
return -1;
if (kind == ENTITY_NONE)
return -1;
for (i = 0; i < WORLD_MAX_ENTITIES; i++) {
e = &w->entities[i];
if (e->kind != ENTITY_NONE)
continue;
e->kind = kind;
return i;
}
return -1;
}
struct entity *
dp_world_find_entity(struct world *w, int entity_id)
{
struct entity *e;
if (!w || entity_id < 0)
return NULL;
if (entity_id >= WORLD_MAX_ENTITIES)
return NULL;
e = &w->entities[entity_id];
if (e->kind == ENTITY_NONE)
return NULL;
return e;
}
int
dp_world_remove_entity(struct world *w, int entity_id)
{
struct entity *e;
if (!(e = dp_world_find_entity(w, entity_id)))
return -1;
memset(e, 0, sizeof(*e));
e->kind = ENTITY_NONE;
return 0;
}
int
dp_world_tick(struct world *w, double delta)
{
int i;
struct entity *e;
struct entity_ball *ball;
for (i = 0; i < WORLD_MAX_ENTITIES; i++)
{
e = &w->entities[i];
switch (e->kind) {
case ENTITY_BALL:
ball = &e->e.ball;
/*ball->pos = dp_vec2_new(500.0, 500.0);*/
ball->pos = dp_vec2_add(ball->pos, dp_vec2_mul(ball->vel, delta));
break;
default:
break;
}
}
return 0;
}
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